Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
thanh tung » thanh cong
doi chieu » doc hieu, doi chi, ho chieu
cao dung » cao dang, cao dong, cap dung
cong san » cong tac
toan tai » toan tap, doanh tai, toan cao
toan ban » van ban
cao ung » cac ung, cho ung, bao ung

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sang - thanh tung ((cao dung) OR (cao ung)) cong san ((toan tai) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh tung ((cao dung) OR (cao ung)) cong san ((toan tai) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - thanh tung ((cao dung) OR (cao ung)) cong san ((toan tai) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh tung ((cao dung) OR (cao ung)) cong san ((toan tai) or (toan ban))*.